| Herent to Olympia Heights (Florida) | 4,648.33 mi (7,480.77 km) |
| Herent to Omaha (Nebraska) | 4,486.45 mi (7,220.24 km) |
| Herent to On Top of the World Designated Place (Florida) | 4,559.99 mi (7,338.59 km) |
| Herent to Onalaska (Wisconsin) | 4,184.26 mi (6,733.91 km) |
| Herent to Oneida (New York) | 3,634.04 mi (5,848.43 km) |
| Herent to Oneonta (New York) | 3,637.23 mi (5,853.56 km) |
| Herent to Ontario (California) | 5,600.63 mi (9,013.35 km) |
| Herent to Ontario (Oregon) | 5,005.90 mi (8,056.22 km) |
| Herent to Opa-locka (Florida) | 4,635.90 mi (7,460.76 km) |
| Herent to Opelika (Alabama) | 4,509.40 mi (7,257.17 km) |
| Herent to Opelousas (Louisiana) | 4,885.59 mi (7,862.60 km) |
| Herent to Orange (California) | 5,620.99 mi (9,046.12 km) |
| Herent to Orange (Texas) | 4,972.56 mi (8,002.56 km) |
| Herent to Orange City (Florida) | 4,526.90 mi (7,285.34 km) |
| Herent to Orangeburg (South Carolina) | 4,284.96 mi (6,895.97 km) |
